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2150 Commits

Author SHA1 Message Date
Chris Lattner 38a1b00a0f fold nested and's early to avoid inefficiencies in MaskedValueIsZero. This 
fixes a very slow compile in PR639.

llvm-svn: 24011
 2005-10-26 17:18:16 +00:00
Jeff Cohen 2b8cbf319c Update Visual Studio projects to reflect moved file. 
llvm-svn: 23998
 2005-10-26 05:36:51 +00:00
Alkis Evlogimenos cb67b650b5 Stop using deprecated types 
llvm-svn: 23973
 2005-10-25 11:18:06 +00:00
Chris Lattner 46705b2f2d Handle allocations that, even after removing dead uses, still have more than 
one use (but one is a cast).  This handles the very common case of:

 X = alloc [n x byte]
 Y = cast X to somethingbetter
 seteq X, null

In order to avoid infinite looping when there are multiple casts, we only
allow this if the xform is strictly increasing the alignment of the
allocation.

llvm-svn: 23961
 2005-10-24 06:35:18 +00:00
Chris Lattner 355ecc09f8 Fix a bug where we would 'promote' an allocation from one type to another 
where the second has less alignment required.  If we had explicit alignment
support in the IR, we could handle this case, but we can't until we do.

llvm-svn: 23960
 2005-10-24 06:26:18 +00:00
Chris Lattner ac87beb03a Before promoting a malloc type, remove dead uses. This makes instcombine 
more effective at promoting these allocations, catching them earlier in the
compile process.

llvm-svn: 23959
 2005-10-24 06:22:12 +00:00
Chris Lattner 216be91817 Pull some code out into a function, no functionality change 
llvm-svn: 23958
 2005-10-24 06:03:58 +00:00
Chris Lattner b37336978f Remove some beta code that no longer has an owner. 
llvm-svn: 23944
 2005-10-24 02:32:41 +00:00
Chris Lattner f9998d9704 Do not build the ProfilePaths directory anymore 
llvm-svn: 23943
 2005-10-24 02:31:49 +00:00
Chris Lattner bde3845548 DONT_BUILD_RELINKED is gone and implied by BUILD_ARCHIVE now 
llvm-svn: 23940
 2005-10-24 02:26:13 +00:00
Chris Lattner 8c087e962c Only build .a file versions of these libraries, instead of .a and .o versions. 
This should speed up build times.

llvm-svn: 23933
 2005-10-24 01:59:48 +00:00
Chris Lattner bd77fac034 Make sure that anything using the ADCE pass pulls in the UnifyFunctionExitNodes 
code

llvm-svn: 23931
 2005-10-24 01:40:23 +00:00
Jeff Cohen 11e26b52b2 When a function takes a variable number of pointer arguments, with a zero 
pointer marking the end of the list, the zero *must* be cast to the pointer
type.  An un-cast zero is a 32-bit int, and at least on x86_64, gcc will
not extend the zero to 64 bits, thus allowing the upper 32 bits to be
random junk.

The new END_WITH_NULL macro may be used to annotate a such a function
so that GCC (version 4 or newer) will detect the use of un-casted zero
at compile time.

llvm-svn: 23888
 2005-10-23 04:37:20 +00:00
Chris Lattner 5df0e36e98 My previous patch was too conservative. Reject FP and void types, but do 
allow pointer types.

llvm-svn: 23859
 2005-10-21 05:45:41 +00:00
Chris Lattner 0c0b38bb4c Do NOT touch FP ops with LSR. This fixes a testcase Nate sent me from an 
inner loop like this:

LBB_RateConvertMono8AltiVec_2:  ; no_exit
        lis r2, ha16(.CPI_RateConvertMono8AltiVec_0)
        lfs f3, lo16(.CPI_RateConvertMono8AltiVec_0)(r2)
        fmr f3, f3
        fadd f0, f2, f0
        fadd f3, f0, f3
        fcmpu cr0, f3, f1
        bge cr0, LBB_RateConvertMono8AltiVec_2  ; no_exit

to an inner loop like this:

LBB_RateConvertMono8AltiVec_1:  ; no_exit
        fsub f2, f2, f1
        fcmpu cr0, f2, f1
        fmr f0, f2
        bge cr0, LBB_RateConvertMono8AltiVec_1  ; no_exit

Doh! good catch!

llvm-svn: 23838
 2005-10-20 04:47:10 +00:00
Chris Lattner 45517baf9f Add an option to this pass. If it is set, we are allowed to internalize 
all but main.  If it's not set, we can still internalize, but only if an
explicit symbol list is provided.

llvm-svn: 23783
 2005-10-18 06:29:22 +00:00
Chris Lattner da1b152c43 Make this work for FP constantexprs 
llvm-svn: 23773
 2005-10-17 20:18:38 +00:00
Chris Lattner 7fde91e365 Oops, X+0.0 isn't foldable, but X+-0.0 is. 
llvm-svn: 23772
 2005-10-17 17:56:38 +00:00
Chris Lattner 32979336a7 relax this a bit, as we only support the default rounding mode 
llvm-svn: 23771
 2005-10-17 17:49:32 +00:00
Chris Lattner 192cd18f53 Fix (hopefully the last) issue where LSR is nondeterminstic. When pulling 
out CSE's of base expressions it could build a result whose order was
nondet.

llvm-svn: 23698
 2005-10-11 18:41:04 +00:00
Chris Lattner 5c9d63da31 Fix another problem where LSR was being nondeterminstic. Also remove elements 
from the end of a vector instead of the beginning

llvm-svn: 23697
 2005-10-11 18:30:57 +00:00
Chris Lattner b7a3894e7c Fix another lsr-is-nondeterministic case 
llvm-svn: 23695
 2005-10-11 18:17:57 +00:00
Chris Lattner 03b9eb506c Make MaskedValueIsZero a bit more aggressive 
llvm-svn: 23677
 2005-10-09 22:08:50 +00:00
Chris Lattner 62010c450f Fix funky xcode indentation 
llvm-svn: 23674
 2005-10-09 06:36:35 +00:00
Chris Lattner eb4be8b942 Hrm, you didn't see this. 
llvm-svn: 23673
 2005-10-09 06:24:02 +00:00
Chris Lattner 4ea0a3eaac Fix a source of non-determinism in the backend: the order of processing 
IV strides dependend on the pointer order of the strides in memory.
Non-determinism is bad.

llvm-svn: 23672
 2005-10-09 06:20:55 +00:00
Jeff Cohen 572910c9a2 Remove useless variable. 
llvm-svn: 23656
 2005-10-07 05:28:29 +00:00
Chris Lattner 20b0754c41 Fix DemoteRegToStack on an invoke. This fixes PR634. 
llvm-svn: 23618
 2005-10-04 00:44:01 +00:00
Chris Lattner 4c3b2b536c Clean up the code a bit. Use isInstructionTriviallyDead to be more aggressive 
and more correct than use_empty().  This fixes PR635 and
SimplifyCFG/2005-10-02-InvokeSimplify.ll

llvm-svn: 23616
 2005-10-03 23:43:43 +00:00
Chris Lattner f07a587c79 Make IVUseShouldUsePostIncValue more aggressive when the use is a PHI. In 
particular, it should realize that phi's use their values in the pred block
not the phi block itself.  This change turns our em3d loop from this:

_test:
        cmpwi cr0, r4, 0
        bgt cr0, LBB_test_2     ; entry.no_exit_crit_edge
LBB_test_1:     ; entry.loopexit_crit_edge
        li r2, 0
        b LBB_test_6    ; loopexit
LBB_test_2:     ; entry.no_exit_crit_edge
        li r6, 0
LBB_test_3:     ; no_exit
        or r2, r6, r6
        lwz r6, 0(r3)
        cmpw cr0, r6, r5
        beq cr0, LBB_test_6     ; loopexit
LBB_test_4:     ; endif
        addi r3, r3, 4
        addi r6, r2, 1
        cmpw cr0, r6, r4
        blt cr0, LBB_test_3     ; no_exit
LBB_test_5:     ; endif.loopexit.loopexit_crit_edge
        addi r3, r2, 1
        blr
LBB_test_6:     ; loopexit
        or r3, r2, r2
        blr

into:

_test:
        cmpwi cr0, r4, 0
        bgt cr0, LBB_test_2     ; entry.no_exit_crit_edge
LBB_test_1:     ; entry.loopexit_crit_edge
        li r2, 0
        b LBB_test_5    ; loopexit
LBB_test_2:     ; entry.no_exit_crit_edge
        li r6, 0
LBB_test_3:     ; no_exit
        lwz r2, 0(r3)
        cmpw cr0, r2, r5
        or r2, r6, r6
        beq cr0, LBB_test_5     ; loopexit
LBB_test_4:     ; endif
        addi r3, r3, 4
        addi r6, r6, 1
        cmpw cr0, r6, r4
        or r2, r6, r6
        blt cr0, LBB_test_3     ; no_exit
LBB_test_5:     ; loopexit
        or r3, r2, r2
        blr


Unfortunately, this is actually worse code, because the register coallescer
is getting confused somehow.  If it were doing its job right, it could turn the
code into this:

_test:
        cmpwi cr0, r4, 0
        bgt cr0, LBB_test_2     ; entry.no_exit_crit_edge
LBB_test_1:     ; entry.loopexit_crit_edge
        li r6, 0
        b LBB_test_5    ; loopexit
LBB_test_2:     ; entry.no_exit_crit_edge
        li r6, 0
LBB_test_3:     ; no_exit
        lwz r2, 0(r3)
        cmpw cr0, r2, r5
        beq cr0, LBB_test_5     ; loopexit
LBB_test_4:     ; endif
        addi r3, r3, 4
        addi r6, r6, 1
        cmpw cr0, r6, r4
        blt cr0, LBB_test_3     ; no_exit
LBB_test_5:     ; loopexit
        or r3, r6, r6
        blr

... which I'll work on next. :)

llvm-svn: 23604
 2005-10-03 02:50:05 +00:00
Chris Lattner e4ed42a426 Refactor some code into a function 
llvm-svn: 23603
 2005-10-03 01:04:44 +00:00
Chris Lattner 360928dbed This break is bogus and I have no idea why it was there. Basically it prevents 
memoizing code when IV's are used by phinodes outside of loops.  In a simple
example, we were getting this code before (note that r6 and r7 are isomorphic
IV's):

        li r6, 0
        or r7, r6, r6
LBB_test_3:     ; no_exit
        lwz r2, 0(r3)
        cmpw cr0, r2, r5
        or r2, r7, r7
        beq cr0, LBB_test_5     ; loopexit
LBB_test_4:     ; endif
        addi r2, r7, 1
        addi r7, r7, 1
        addi r3, r3, 4
        addi r6, r6, 1
        cmpw cr0, r6, r4
        blt cr0, LBB_test_3     ; no_exit

Now we get:

        li r6, 0
LBB_test_3:     ; no_exit
        or r2, r6, r6
        lwz r6, 0(r3)
        cmpw cr0, r6, r5
        beq cr0, LBB_test_6     ; loopexit
LBB_test_4:     ; endif
        addi r3, r3, 4
        addi r6, r2, 1
        cmpw cr0, r6, r4
        blt cr0, LBB_test_3     ; no_exit

this was noticed in em3d.

llvm-svn: 23602
 2005-10-03 00:37:33 +00:00
Chris Lattner 8fcce170cf when checking if we should move a split edge block outside of a loop, 
check the presplit pred, not the post-split pred.  This was causing us
to make the wrong decision in some cases, leaving the critical edge block
in the loop.

llvm-svn: 23601
 2005-10-03 00:31:52 +00:00
Jeff Cohen f8a5e5ae6e Fix VC++ warnings. 
llvm-svn: 23579
 2005-10-01 03:57:14 +00:00
Chris Lattner a554c9470b Insert stores after phi nodes in the normal dest. This fixes 
LowerInvoke/2005-08-03-InvokeWithPHI.ll

llvm-svn: 23525
 2005-09-29 17:44:20 +00:00
Chris Lattner 87ef943a4c Fold isascii into a simple comparison. This speeds up 197.parser by 7.4%, 
bringing the LLC time down to the CBE time.

llvm-svn: 23521
 2005-09-29 06:17:27 +00:00
Chris Lattner 5f6035feb0 remove a bunch of unneeded stuff, or self evident comments 
llvm-svn: 23519
 2005-09-29 06:16:11 +00:00
Chris Lattner c244e7c178 Implement a couple of memcmp folds from the todo list 
llvm-svn: 23517
 2005-09-29 04:54:20 +00:00
Chris Lattner ea7214b23d Constant fold llvm.sqrt 
llvm-svn: 23487
 2005-09-28 01:34:32 +00:00
Chris Lattner 3b63bb375c add a note about a way to improve this code further, that I won't be getting 
to right now.

llvm-svn: 23485
 2005-09-27 22:44:59 +00:00
Chris Lattner eb953f0ef8 Fix a regression in my previous patch, fixing GlobalOpt/2005-09-27-Crash.ll 
and PR632.

llvm-svn: 23484
 2005-09-27 22:28:11 +00:00
Chris Lattner e285f5ed8f Avoid spilling stack slots... to stack slots. 
llvm-svn: 23478
 2005-09-27 21:33:12 +00:00
Chris Lattner 87eb249300 Completely rewrite 'correct' eh support. This changes how setjmp insertion 
is performed so it is only at most once per function that contains an invoke
instead of once per invoke in the function.  This patch has the following perks:

1. It fixes PR631, which complains about slowness.
2. If fixes PR240, which complains about non-volatile vars being live across
   setjmp/longjmps.
3. It improves (but does not fix) the jmpbuf alignment issue on itanium by not
   forcing the jmpbufs to always be 8-bytes off the alignment of the structure.
4. It speeds up 253.perlbmk from 338s to 13.70s (a 25x improvement!), making us
   now about 4% faster than GCC.

Further improvements are also possible.

llvm-svn: 23477
 2005-09-27 21:18:17 +00:00
Chris Lattner 92233d2175 Make the pass name simpler 
llvm-svn: 23476
 2005-09-27 21:10:32 +00:00
Chris Lattner 16cd356fb2 allow demotion to volatile values, add support for invoke 
llvm-svn: 23473
 2005-09-27 19:39:00 +00:00
Chris Lattner 3d27e7f27f Add support for external calls that we know how to constant fold. This implements 
ctor-list-opt.ll:CTOR8

llvm-svn: 23465
 2005-09-27 05:02:43 +00:00
Chris Lattner 29b2780c8a Fix a bug where we would evaluate stores into linkonce objects which could be 
potentially replaced at link-time.

llvm-svn: 23463
 2005-09-27 04:50:03 +00:00
Chris Lattner 65a3a0918f Implement support for static constructors with calls in them. This is useful 
because gccas runs globalopt before inlining.

This implements ctor-list-opt.ll:CTOR7

llvm-svn: 23462
 2005-09-27 04:45:34 +00:00
Chris Lattner da1889b778 Refactor this code a bit, no functionality changes. 
llvm-svn: 23460
 2005-09-27 04:27:01 +00:00
Chris Lattner f2f89af69a Remove some dead code. ctor evaluation subsumes empty ctor elim 
llvm-svn: 23453
 2005-09-26 20:38:20 +00:00